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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * (C) Copyright 2012-2016 Stephen Warren
- */
- #ifndef __CONFIG_H
- #define __CONFIG_H
- #include <linux/sizes.h>
- #include <asm/arch/timer.h>
- #ifndef __ASSEMBLY__
- #include <asm/arch/base.h>
- #endif
- #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
- #define CONFIG_SKIP_LOWLEVEL_INIT
- #endif
- /* Architecture, CPU, etc.*/
- /* Use SoC timer for AArch32, but architected timer for AArch64 */
- #ifndef CONFIG_ARM64
- #define CONFIG_SYS_TIMER_RATE 1000000
- #define CONFIG_SYS_TIMER_COUNTER \
- (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
- #endif
- /*
- * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
- * so 2708 has historically been used rather than a dedicated 2835 ID.
- *
- * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
- * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
- * rather than obtaining a valid ID:-/
- *
- * For the bcm2837, hopefully a machine type is not needed, since everything
- * is DT.
- */
- #ifdef CONFIG_BCM2835
- #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708
- #endif
- /* Memory layout */
- #define CONFIG_SYS_SDRAM_BASE 0x00000000
- #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
- /*
- * The board really has 256M. However, the VC (VideoCore co-processor) shares
- * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
- * smaller amount of RAM is present in order to avoid stomping on the area
- * the VC uses.
- */
- #define CONFIG_SYS_SDRAM_SIZE SZ_128M
- #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
- CONFIG_SYS_SDRAM_SIZE - \
- GENERATED_GBL_DATA_SIZE)
- #define CONFIG_SYS_MALLOC_LEN SZ_4M
- #define CONFIG_LOADADDR 0x00200000
- #ifdef CONFIG_ARM64
- #define CONFIG_SYS_BOOTM_LEN SZ_64M
- #endif
- /* Devices */
- /* GPIO */
- #define CONFIG_BCM2835_GPIO
- /* LCD */
- #define CONFIG_LCD_DT_SIMPLEFB
- #define CONFIG_VIDEO_BCM2835
- #ifdef CONFIG_CMD_USB
- #define CONFIG_TFTP_TSIZE
- #endif
- /* DFU over USB/UDC */
- #ifdef CONFIG_CMD_DFU
- #define CONFIG_SYS_DFU_DATA_BUF_SIZE SZ_1M
- #define CONFIG_SYS_DFU_MAX_FILE_SIZE SZ_2M
- #ifdef CONFIG_ARM64
- #define KERNEL_FILENAME "Image"
- #else
- #define KERNEL_FILENAME "zImage"
- #endif
- #define ENV_DFU_SETTINGS \
- "dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \
- "config.txt fat 0 1;" \
- KERNEL_FILENAME " fat 0 1\0"
- #else
- #define ENV_DFU_SETTINGS ""
- #endif
- /* Console configuration */
- #define CONFIG_SYS_CBSIZE 1024
- /* Environment */
- #define CONFIG_SYS_LOAD_ADDR 0x1000000
- /* Shell */
- /* ATAGs support for bootm/bootz */
- #define CONFIG_SETUP_MEMORY_TAGS
- #define CONFIG_CMDLINE_TAG
- #define CONFIG_INITRD_TAG
- /* Environment */
- #define ENV_DEVICE_SETTINGS \
- "stdin=serial,usbkbd\0" \
- "stdout=serial,vidconsole\0" \
- "stderr=serial,vidconsole\0"
- #ifdef CONFIG_ARM64
- #define FDT_HIGH "ffffffffffffffff"
- #define INITRD_HIGH "ffffffffffffffff"
- #else
- #define FDT_HIGH "ffffffff"
- #define INITRD_HIGH "ffffffff"
- #endif
- /*
- * Memory layout for where various images get loaded by boot scripts:
- *
- * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
- *
- * Older versions of the boot firmware place the firmware-loaded DTB at 0x100,
- * newer versions place it in high memory. So prevent U-Boot from doing its own
- * DTB + initrd relocation so that we won't accidentally relocate the initrd
- * over the firmware-loaded DTB and generally try to lay out things starting
- * from the bottom of RAM.
- *
- * kernel_addr_r has different constraints on ARM and Aarch64. For 32-bit ARM,
- * it must be within the first 128M of RAM in order for the kernel's
- * CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed
- * to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The
- * decompressor also likes to relocate itself to right past the end of the
- * decompressed kernel, so in total the sum of the compressed and and
- * decompressed kernel needs to be reserved.
- *
- * For Aarch64, the kernel image is uncompressed and must be loaded at
- * text_offset bytes (specified in the header of the Image) into a 2MB
- * boundary. The 'booti' command relocates the image if necessary. Linux uses
- * a default text_offset of 0x80000. In summary, loading at 0x80000
- * satisfies all these constraints and reserving memory up to 0x02400000
- * permits fairly large (roughly 36M) kernels.
- *
- * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't
- * conflict with something else. Reserving 1M for each of them at
- * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty.
- *
- * On ARM, both the DTB and any possible initrd must be loaded such that they
- * fit inside the lowmem mapping in Linux. In practice, this usually means not
- * more than ~700M away from the start of the kernel image but this number can
- * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line
- * parameter given to the kernel. So reserving memory from low to high
- * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for
- * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000.
- * Even with the smallest possible CPU-GPU memory split of the CPU getting
- * only 64M, the remaining 25M starting at 0x02700000 should allow quite
- * large initrds before they start colliding with U-Boot.
- */
- #define ENV_MEM_LAYOUT_SETTINGS \
- "fdt_high=" FDT_HIGH "\0" \
- "initrd_high=" INITRD_HIGH "\0" \
- "kernel_addr_r=0x00080000\0" \
- "scriptaddr=0x02400000\0" \
- "pxefile_addr_r=0x02500000\0" \
- "fdt_addr_r=0x02600000\0" \
- "ramdisk_addr_r=0x02700000\0"
- #if CONFIG_IS_ENABLED(CMD_MMC)
- #define BOOT_TARGET_MMC(func) \
- func(MMC, mmc, 0) \
- func(MMC, mmc, 1)
- #else
- #define BOOT_TARGET_MMC(func)
- #endif
- #if CONFIG_IS_ENABLED(CMD_USB)
- #define BOOT_TARGET_USB(func) func(USB, usb, 0)
- #else
- #define BOOT_TARGET_USB(func)
- #endif
- #if CONFIG_IS_ENABLED(CMD_PXE)
- #define BOOT_TARGET_PXE(func) func(PXE, pxe, na)
- #else
- #define BOOT_TARGET_PXE(func)
- #endif
- #if CONFIG_IS_ENABLED(CMD_DHCP)
- #define BOOT_TARGET_DHCP(func) func(DHCP, dhcp, na)
- #else
- #define BOOT_TARGET_DHCP(func)
- #endif
- #define BOOT_TARGET_DEVICES(func) \
- BOOT_TARGET_MMC(func) \
- BOOT_TARGET_USB(func) \
- BOOT_TARGET_PXE(func) \
- BOOT_TARGET_DHCP(func)
- #include <config_distro_bootcmd.h>
- #define CONFIG_EXTRA_ENV_SETTINGS \
- "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
- ENV_DEVICE_SETTINGS \
- ENV_DFU_SETTINGS \
- ENV_MEM_LAYOUT_SETTINGS \
- BOOTENV
- #endif
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